Study and practice Biology past questions with answers and detailed explanations. Then test your knowledge using our interactive CBT practice platform and prepare confidently for your upcoming examinations.
Using iodine solution, Biuret test, Benedict reagents and ethanol, respectively in testing for reducing
sugars, which of the following trends of colour changes would be observed?
ABlue → black → blue → brown → clear
BBrown → blue → brick red → clear
CBrown → violet → blue → clear
DBrown → blue → violet → milky
View Explanation & Discuss
Question 1452
waec2002
The structures labelled II are associated with
Astorage of plant nutrients
Borganic acids
Cnitrogen-fixing bacteria
Dputrefying microbes
View Explanation & Discuss
Question 1453
waec2002
The structures labelled II are
Agroundnut seeds
Bunderground root nuts
Croot Tubers
Droot nodules
View Explanation & Discuss
Question 1454
waec2002
Which of the following substances is contained in chloroplasts?
AStarch
BSugar
CGlycogen
DDextrin
View Explanation & Discuss
Question 1455
waec2002
After fertilization in the flowering plants, the zygote develops into the
Aplumule
Bradicle
Ccotyledon
Dembryo
View Explanation & Discuss
Question 1456
waec2002
In flowering plants, fertilization would occur when
Athe pollen grows downwards penetrating the style
Ba pollen grain is transferred to the stigma
Cone of the nuclei inside the pollen tube fuses with the ovum
Dthe nucleus of the pollen tube divides
View Explanation & Discuss
Question 1457
waec2002
Which of the following is not an example of entomophilous flower?
AHibiscus
BFlamboyant
CGuinea grass
DAlIamanda
View Explanation & Discuss
Question 1458
waec2002
When a person moves from a darkroom into bright light, the pupil becomes
Ared
Blarger
Cwhite
Dsmaller
View Explanation & Discuss
Question 1459
waec2002
The structure of the ear that is responsible for balancing is the
Asemi-circular carnals
Bpinna
Cauditory nerve
Dfenestra ovalis
View Explanation & Discuss
Question 1460
waec2002
If the cerebellum of a person is slightly damaged, which of the following will be impaired?
Avision
BWalking
CBreathing
DDigestion
View Explanation & Discuss
Question 1461
waec2002
In humans, which of the following pairs of hormones correspond to male and female respectively?
AOestroqen and adrenalin
BProgesterone and testosterone
CTestosterone and oestrogen
DAdrenalin and progesterone
View Explanation & Discuss
Question 1462
waec2002
Which of the following organs in humans is responsible for the removal of excess water?
AThe spleen
BThe kidney
CLarge intestine
DSmall intestine
View Explanation & Discuss
Question 1463
waec2002
Adrenalin is considered as a hormone for “fright and flight” because it
Acontrols the fluid content of the body
Bis used in protein metabolism
Cplays a role in the pH balance of the body fluids
Dprepares the body for action.
View Explanation & Discuss
Question 1464
waec2002
In which of the following processes in mammals is liquid passed from blood capillaries to Bowman‘s capsule?
AFiltration
BDiffusion
COsmosis
DReabsorption
View Explanation & Discuss
Question 1465
waec2002
The oxygen released during photosynthesis is obtained
Afrom the catalytic splitting of carbon-dioxide in plant tissues
Bfrom the breakdown of glucose molecules in cells
Cduring the photolysis of water using energy trapped in chlorophyll
Dby the excretion of excess oxygen in plant tissues
View Explanation & Discuss
Question 1466
waec2002
Which of the following does not occur during inhalation in mammals?
ARib cage is raised up
BDiaphragm contracts and becomes dome shaped
CInter-coastal muscle contracts
DVolume of the thoracic cavity increases.
View Explanation & Discuss
Question 1467
waec2002
Which of the following is used to measure the rate of water uptake in plants?
APotometer
BHydrometer
CHygrometer
Daspirator
View Explanation & Discuss
Question 1468
waec2002
The function of the red blood cells is to
Aengulf invading bacteria
Baid in protein formation
Ctransport oxygen to the cells
Dcontrol blood glucose level
View Explanation & Discuss
Question 1469
waec2002
Diffusion is most effective in living organisms, when the surface area is
Alarge and the thickness is also large
Bsmall while the thickness is large
Clarge while the thickness is small
Dthe same as its thickness.
View Explanation & Discuss
Question 1470
waec2002
Which of the following will ease the friction between the ends of bones in a movable joint?
